One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

A rare, flower-shaped example of Brutalist architecture in Switzerland.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

Lavish royal estate punctuated with heated greenhouses.

Climb inside an iron crystal magnified 165 billion times its normal size.

Cozy basement bar sports an inventory of over 2,000 beers.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

An open-air sewer system that was covered piece-by-piece over 300 years.

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

This ancient theater was once the home of fierce gladiatorial battles.

Balconies that have a most unusual accent.

Artist's eccentric property excessively decorated with found objects and work of his own.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

Longest canal tunnel in the world, abandoned in the 1960s.

This historic island prison holds one of the dungeons from the Count of Monte Cristo even though it is a work of fiction.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

This bridge was constructed from the rubble of the infamous Bastille.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.